Well-drilling apparatus.



No. 673,500. Patented May 7, l90l.

N. G; HALL WELL DRILLING APPARATUS.

L (Application filed Feb. 14, 1,901.)

(No Model.) 2 Sheets-Sheet I.

No. 673,500. Patented ma 7, l90l.

N. G. HALL.

WELL DRILLING APPARATUS.

v Appliqation filed Feb. 14. 1901.) I (No Model.) 2 Shaais$hoat 2.

I I Q .mlll

Rs CO PNOTO-LITHO., WASMINGTUIt D. C

UNITED STATES PATENT QFFICE.

NORMAN G. HALL, OF SPENCER, SOUTH DAKOTA.

WELL-DRILLING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 673,500, dated. May 7,1901. Application filed February 14, 1901. Serial No. 47,258. (No model.

To all whom it may concern:

Be it known that I, NORMAN G. HALL, a citizen of the United States,residing at Spencer, in the county of McOook and State of South Dakota,have invented certain new and useful Improvements in Well-Drillin gApparatus; and I do declare the following to be a full, clear, and exactdescription of thein-v vention, such as will enable others skilled inthe art to which it appertains to make and use the same.

My invention relates to improvements in well-drilling apparatus, and hasfor its objects to provide simple and eifective means for turning ortwisting the drill-rod and to provide a construction of parts equallywell adapted for either rock or dirt drilling.

With theseand other minor ends in view, which will appear-as the natureof the invention is better understood, the same consists of certainnovel features of construction, combination, and-arrangement of parts,as will be hereinafter more fully described, and particularly pointedout in the appended claim.

In the accompanying drawings, Figure 1 is a top plan view of awell-drilling apparatus embodying my invention. Fig. 2 is a sideelevation of the same. Fig. 3 is a central vertical section. Figs. 4, 5,6, and 7 are detail plan views of the difierent parts of the apparatus.

Like reference characters designate corresponding parts throughout theseveral views.

Referring now more particularly to the drawings, the numeral 1represents the wellcasing, which extends in practice a sufficient vtheapplication of the proper form of swivel to the upper end of said rod,dirtwork requiring the use of an open-work swivel, which will permitwater to flow down through said rod, as will be readily understood bythose versed in the art.

The drill-turning mechanism comprises in to one end an opening 10 toadmit said casing l and at the opposite end a series of apertures 11 toadj ustably receive one end of a pitmanrod 12, the opposite end of whichis connected with a crank 13 on the drive-shaft 14 of thedrill-operating mechanism. The operation of the shaft causes the pitmanto reciprocate and to in turn oscillate the said bar 9, which turnsloosely about the well-casing. By adj usting the pitman-rod to engagethe desired aperture 11 in the oscillating bar the stroke of the lattermay be varied in an obvious manner. About the well-casing above theoscillating bar is also mounted a ratchetwheel 15, formed with a hub 16toloosely embrace and turn on said casing a series of radial arms 1-7,and a toothed rim 18, which is engaged at one pointby the stop-pawl 8 tohold the ratchetwheel against retrograde movement. Engaging the toothedrim at diametrically opposite sides are also feed-pawls 19 on theoscillating bar, which in one direction of movement of the bar engagethe teeth of the rim and revolve the ratchet-disk a portion of arevolution, and in the reverse direction of revolution of the bar rideloosely over said teeth while the pawl 8 operates to prevent the wheelfrom moving backwardly.

Each pawl 19 is held in working position by a spring 20, secured at oneend thereto and at its opposite end to the bar. As shown in Fig. 3, theupper surface of the ratchet-wheel lies practically flush with the upperend of the well-casing 1.

7 Above the well-casing and ratchet-wheel isv readily detached and a newone substituted therefor. The disk is held. from dropping off thedrill-rod when the rod is removed by a washer 25, secured to said rodbeneath the disk. The ratchet-wheel and disk are connected to move inunison by plugs 26, fitting in registering sockets 27 and 28, formed insaid parts. These plugs are preferably made of wood or some suitablematerial which will readily fracture when the resistance to the turningof the drill becomes greater than normal, so as to avoid injury to thedisk and wheel. The plugs may be readily knocked out when it is desiredto detach the disk from the ratchet-Wheel.

In operation it will be readily understood from the foregoingdescription, taken in connection with the drawings, that at eachrevolution of the drive-shaft and on each stroke of the drill theoscillatory bar will be operated to move the ratchet-wheel a part of arevolution, whereby motion will be communicated to the disk 21, whichwill turn the drill-rod 2.

Changes in the form, proportion, and minor details of construction maybe made within the scope of the invention without departing tion, with awell-casing and a drill-rod, of a collar detachably mounted upon saidcasing and provided with a radial arm carrying a stop-pawl, anoscillating operating-bar mounted upon the well-casing above said collarand supported thereon, a ratchet-wheel rotatably mounted on the casingabove the operatingbar and engaged by said stop-pawl, pawls on theoperating-bar to engage and turn the ratchet-wheel, a disk engagingthedrill-rod, and plugs removably fitted in corresponding openings in theratchet-wheel and disk and detachably connecting said parts together,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit nesses.

NORMAN G. HALL. Witnesses:

WM. HOESE, V. H. MASTERS.

